Check-valve.



G. I. WILLIAMS.

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APPLICATION FILED JAN. 10, 190B.

Patented Feb. 2, 1909.

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C ARLES I ILLIAMS, OF UTICA; E YORK- GHE OK-VALVE Specification of Letters Patent.

Patented Feb. 2, 1909.

Application filed January 10, 1908. Serial No. 410,087.

To all whom it may concern:

Be it known that 1, CHARLES I. WILLIAMs, a citizen of the United States, residing at Utica, in the county of Oneida and State of New York, have invented certain new and. useful Improvements in Check-Valves, of which the following is a specification, refer ence being had therein to the accompanying drawing.

My invention relates to an im roved check-valve for water ages, and I declare the following isa full, 0 ear, concise and exact descri tion thereof, sufficient to enable one skille in the art to make and use the same, reference being had to the accompanying drawings in which like reference characters refer to like arts throu hout.

The invention 18 illustrated as mounted in a casing which is used to carry and inclose the valves of a water gage and comprises elements by which such valves are automatically closed when the water-glass breaks, which normally remains open and can be held open, but which cannot be held closed.

I am aware that check-valves having or claiming such features have been used and patented, but they are open to various obections and I have invented a valve which I elieve to be a substantial improvement upon them, as regards the elements of safety, economy and convenience.

Particularly an advantage of my device will be seen in the sim licit and ease of assembling the parts. '1 ma c this clear it is noted that in certain other structures an exact adjustment of the parts is necessary as the service of the device is dependent upon its correct adjustment and this requires one who is skilled in such matters to test the device during the assembling of the parts to make sure that the correct adjustment is made.

The invention is shown in one form in the accompanying drawings in which Figure 1 is a view of enough of the valve construction to show my invention, the view being of one of the casings looking upward into the upper one, for instance, certain parts being cut away, the bushings being shown unscrewed. Fig. 2 shows the casing, the stem being cut in section on line 22 of Fig. 1. Fig. 3 is a View of interior parts on the line 33 of Fig. 1. Fig. 4 is a view of the stem. Fig. 5 is a side view of the opposite side of the valve proper, from that shown in Fig. 3, While Figs. 6 and 7 are views from the lower and the upper sides thereof, as it ap ears in said figures.

eferrin to the figures more in detail, A shows the ace of the boiler, B the casin of the valve which has screw-threaded end to mount it on the boiler-plate. At the opposite end, D, the casing is formed to receive a valve stem to close one end of the valvethimble, as is illustrated in an a lication filed by me May 23, 1907, Seriai umber 375,223, the general form of such a stem and valve being so well-known that particular showing and description is unnecessary. The drawings in the said application also show the general contour and internal formation of the casing, which is also here seen to have two chambers, one shown as E with opening E for a plug (not shown) and the other as F with opening F, exteriorly threaded for the mounting of the glass, there being between the chambers the partition G, through which is the thimble H, formed by boring and trimming the partition or by the insertlon of a se arate piece, as shown in said application, or instance. It will be understood that one end, h, of the thimble is repared for the valve on the stem which has been referred to but is not shown and which may be used to close the valve at that end. The thimble is ground or otherwise repared at its other end, 71/, to receive t e valve shown as a whole by I, and to which the invention more particularly relates.

The casing is bored transversely to receive the stem 1, as seen in Fig. 1, a nipple 2 hein provided to en port the stem, the inner enc of which may also be su ported in the wall of the casing, as at he stem is provided with a shoulder 4, as seen in Fi 4.

The valve I is formed with a sleeve part 5 bored for the stem 1, the sleeve projecting on one side in lug 6 designed to abut against a stop 24 on the interior wall of the casing at a pro er point to limit the swing of the valve an prevent its 0 ening so far that it will not be readily closed y the boiler pressure. The sleeve has projection or arm 7 bored to receive loosely bolt 8 (held by nut 9) which carries disk 10 which is ground to close the end h of the thimble when the valve is swung thereto.

When the stem 1 is inserted for the support of the valve its shoulder 4 abuts against the adjacent end of the sleeve, part of which is, however, cut away leaving the shoulder 11 and rear or opposite side thereof 12, the construction forming a lug or shoulder on one side of the sleeve.

Into the reduced portion of thef'stem 1 is set a pin 13 which, when the stem is turned strikes shoulder 11 and swings the valve open. But the cutout fy which shoulder 11 is formed extends so far that the reverse turning of the stem cannot Lring the pin 13 to shoulder 12 and thus hold the valve closed. The limitation of that reverse movement of the stem is effected by the following means: The nipple 2 is cut out, as seen in Fig. 2, leaving the shoulder 14 and rear or opposite face 15, the construction being a lug or shoulder on the end of the nipple. A pin 16 is set in the stem so that when it is turned in the direction to close the valve it strikes the shoulder l4 and cannot, therefore, go far enou 'h to bring pin 13 against shoulder 12. n brief, turmng the stem in one direction brings one in in action to open the valve, while turning it in the opposite direction [rings the other pin into action to prevent holding the valve closed fy use of the stem.

For the purpose of making the improvements of my invention clear it should be noted that in certain other constructions an with the stem an made with shoulders to engage with the shoulders on the valve sleeve. In ractice, however, that portion is not ma e integral with the sleeve fut is a separate ring held in the sleeve by a pin which is often known to he sheared oil so that the valve stem flies out, disabling the valve and doing damage, but which is impossible in my construction fecause of features to be pointed out. It is impossil le, at least very expensive, to make the ring-like portion integral with the stem, as the shoulders must be cut out in making the stem and therefore the device has lost efficiency by making it as is done. My construction, owever, makes a more eflicient, simpler and a cheaper device possil 1e.

To further illustrate my invention, it is noted that to limit the reverse movement of the stem a ring is sometimes used which is held in place only by friction contact with its adjacent (parts, which friction can be overcome, an is so should the parts become loosened or be imperfectly assembled, which may be the case since tle construction does not provide for a definite and unalterable locatlon of the ring. This requires great nicety of adiustment in assembling the parts.

On the stem is bushing 17 to thread on the nip le 2, and having an interior shoulder 18, an its outer end being bored to receive the sleeve 19 with collar 20 and the nut 21, packing 2;? being piaced as shown, the construction and fittingi being such, and the packing so place that the stern, when left in the open position, will be turned by boiler pressure on the valve to ermit the valve to close. It will be seen t at the ring 18 on the bushing 17 prevents the stem from blowing out should the pin 13 become sheared or broken off. A wheel or other suitable member 23 is placed on the stem to turn it.

The device is shown in a single form, and it will be understood that modifications may be made without departing from the scope of the invention.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A device of the character described having a casing, a stem in the casing, a valve on tle stem, the said valve having a lug adjacent the stem and the stern having a pin therein adapted, by engagement with the lug to turn the valve in one direction, a nipple on the casing cut away at its end to form a lug and a pin in the stem adapted by engagement thereof with the lug to stop the turning of the stem in the opposite direction, substantially as set forth.

2. In a device of the character described,

a casing, a hinge valve therein, a stem supenlar ed rin like ortion is formed inte ral g g F g porting the valve hingedly, the stem having a shoulder to abut against the valve, the valve being cut away to provide space for a pin and a pin in the stem to play in said space on the turning of the stem and to open the valve by its contact with the end wa of said s ace, substantially as set forth.

3. 11 a device of the character described, a casing, a hinge valve therein, a stem supporting the valve hingedly, the stem having a shoulder to abut against the valve, the valve being cut away to provide space for a pin and a pin in the stem to play in said space on the turning of the stem and to o en t .e valve by its contact with the end w of said s, ace, an exterior nipple cut away to provi e a space for a pin and a pin in the stem to play in said space on the turning of the stem to limit the turning of the stem in the o posite direction and revent the closing 0 the valve, substantially as set forth.

4. In a device of the character described, a casing, a nipple thereon having its end cut away to leave a stop, a stem, a pin in the stem engaging the stop on the nipple to limit the turning of the stem, and a bushing havin an exterior collar adapted to engage the said pin and retain the stem in the casing, substantially'as set forth.

In testimony whereof I affix in presence of two witnesses.

CHARLES I. WILLIAMS.

my signature Witnesses: A

E. T. DE GIORGI, H. C. BUCK. 

